Interactive DB exploration shell

[modolol]

@fpavogt
I made some changes in the way of working with the DB:

• Removed the context manager (it's frankly not clear the benefit of having one or not to read/write to the DB)
• Trying a utility to explore the DB
• ...a few things here and there that didn't seem to be very good....

Pull the branch db_access_mngmt, run the demo_script and tell me what you think... 😉

[fpavogt]

Wow ... this is very cool ... and very unexpected too ! The interactivity was a big surprise, but it certainly can be very handy to rapidly explore the content of the DB. However, is it also possible to call these info, prm, etc ... function from a script (i.e. non-interactively) ? This sort of scripted calls would be very useful to setup automated reduction recipes without having to know exactly (e.g.) the dates and/or amount and/or variables of launches in the DB. What do you think ?